2020112221 has 4 divisors (see below), whose sum is σ = 2031273244. Its totient is φ = 2008951200.

The previous prime is 2020112219. The next prime is 2020112251. The reversal of 2020112221 is 1222110202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1222110202 = 2 ⋅611055101.

It can be written as a sum of positive squares in 2 ways, for example, as 49196196 + 1970916025 = 7014^2 + 44395^2 .

It is a cyclic number.

It is not a de Polignac number, because 2020112221 - 2¹ = 2020112219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2020112201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5580240 + ... + 5580601.

It is an arithmetic number, because the mean of its divisors is an integer number (507818311).

Almost surely, 2^2020112221 is an apocalyptic number.

It is an amenable number.

2020112221 is a deficient number, since it is larger than the sum of its proper divisors (11161023).

2020112221 is a wasteful number, since it uses less digits than its factorization.

2020112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11161022.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2020112221 is about 44945.6585333890. The cubic root of 2020112221 is about 1264.1302735612.

Adding to 2020112221 its reverse (1222110202), we get a palindrome (3242222423).

The spelling of 2020112221 in words is "two billion, twenty million, one hundred twelve thousand, two hundred twenty-one".